<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <title>41-CSS发光边角效果</title>
    <link rel="stylesheet" href="style.css" />
  </head>

  <body>
    <div class="loader" style="--i: 1"></div>
    <div class="loader" style="--i: 2"></div>
    <div class="loader" style="--i: 3"></div>
    <div class="loader" style="--i: 4"></div>
  </body>
</html>
